Improvement in sewing-machines for embroidering



2 Sheets-Sheet 1.

E. WRIGHT. Sewing-Machine for Embroidering.

No."221,650. Patented Nov. 11, 1879.

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UNITED STATES PATENT OFFICE.

EDWARD WRIGHT, OF VVORGESTER, MASSACHUSETTS.

IMPROVEMENT IN SEWING-MACHINES FOR EMBROIDERING.

Specification forming part of Letters Patent No. 221,650, dated November11, 1879; application filed April 14, 1879.

To all whom it may concern:

Be it known that I, EDWARD WRIGHT, of Worcester, in the county ofWorcester and State of Massachusetts, have invented certain new anduseful Improvements in Sewing-Machines for Embroidering; and I do herebydeclare the following to be a description of my said inventionsufficiently full, clear, and exact to enable others skilled in the artto which it appertains to make and use the same, reference being bad tothe accompanying drawings, which form a part of this specification, andin which- Figure 1 represents a front view of such parts of a sewing-machine for embroidering as are necessary to illustrate the nature of myinvention. Fig. 2 represents a vertical section at line 00 00, Fig. 1,drawn on a larger scale. Fig. 3 shows a modified form of cam, and Figs.4 and 5 illustrate two patterns of embroidery.

This invention relates to machines of that class known as the Bonnazmachine, for embroidery-stitching, braiding, and similar work, inventedby Antoine Bonnaz, and described in Letters Patent Nos. 83,909 and83,910, dated November 10, 1 868; and myinvention consists in theautomatically operating governor device, constructed-and arrangedashereinafter described, for controlling the ac tion of theuniversal-feed mechanism in said machines for the continuous production,in a uniform series, of a figure or embroidery pattern, as more fullyhereinafter explained, the particular subject-matter claimed beinghereinafter definitely specified.

It will be understood that the sewing mechanism, universal-feed motion,and other portions of the machine not herein shown orspecificallydescribed are to be constructed and arranged as in theordinary Bonnaz machines now in use.

In the drawings, A denotes the frame; B, the driving-shaft; G, thetmiversal-jointed feedbar with presser-foot c, for holding and guidingthe cloth; D, the needle-bar carrier; and E, F, and G,theconnecting-shafts, provided with intermeshiug bevel-gears d c f,whereby the simultaneous action of the feeding and looping devices aboveand below the table is effected. Said devices are arranged and combinedwith the usual operating parts as now used on the Bonnaz machines, allof which being well known, further illustration and description thereofare herein omitted.

In connection with the drivingshaft B, I arrange a gear, B, andintermeshing and operated therefrom a train of gears, H, I, I, and J,said latter gears being supported by a suitable bracket or standard, A,secured to the frame A. Connected to the gear J, and revolvingtherewith, is a patternplate or cam, K, the face form of which dependsupon the style of figure or design to be produced by the machine, setsof cams K being interchangeable for the production of different designsat pleasure.

E indicates a gear fixed on the shaftE and meshing with a reciprocatingrack, L, which is retained to move in suitable guides at in such mannerthat longitudinal action of said rack L causes arotary movement of theshaftsE F G.

M indicates an arm or lever, pivoted at its upper end, m, to the bracketA, with its lower extremity extended downward to engage with the pin orlug l on the rack L. A lug or bearing-finger, M, on the side of said armM rests upon the face of the cam K, so that revolution of said camimparts a swinging action to the arm M, which, in turn, reciprocates therack L, and operates the shafts E F G and parts con nected therewith.Thus the face form of the cam K controls the action of the universalfeed mechanism in the development of the design upon the cloth or othermaterial to be embroidered.

N indicates a spring, which acts on the parts in opposition to the barM, and serves to hold the lug M against the face of the cam K. In

the present instance said springis coiled about the shaft E; but it canbe arranged in any suitable manner or position for effecting the desiredresult; or by employing a grooved cam that would move the arm in bothdirections the spring might be omitted.

In the operation of my improved devices a continuous rotary movement ofthe cam or pattern-plate K is imparted from the drivingshaft B, while anirregular, intermittent, or va riable movement forward or backward ascontrolled by the cam-face is transmitted to the shaft E, and thence tothe universal-feed motions of the machine, thus causing said feed motionto develop the particular design required, and to repeat said design ina perfect and uniform manner at each revolution ot'the governing-cam,and without any attention from the operator.

By using a cam of the form shown in Fig. 2 a design like Fig. 4 isproduced, while a cam similar to Fig. 3 causes the production of adesign similar to Fig. Other designs can he made by varying the form ofcams, while the pattern can also he more or less extended by change inthe relative size of the gears I l, and to facilitate such change theirsupportingstud I is made adjustahle by means of the curved slot a in thebracket A.

A curved segment ma be used in lieu of the straight rack I1, and thegovernor mechanism may be titled to act on either of the shafts E, F, orG without change in the result.

Automatic governing attachments such as herein shown and described canbe readily applied to any of the Bonnaz machines now in use withoutmaterial change in their present mechanism.

What 1 claim as of my inventiomand desire to secure by Letters Patent,is-

In combination with universal-feed mechanism and shafts B and E asemployed in a Bonnaz sewing and embroidering machine, the automaticgoverning mechanism consisting of the gears B, H, I, I, J, and E, thepattern-plate or cam K, the arm or lever M, and the reciprocating rackL, said parts heiug constructed and organized for operationsubstantially as and for thepurpose set forth.

Witness my hand this 2d day of April, A. D. 1879.

EDWARD \VRIGHT.

Witnesses:

UHAs. H. BURLEIGH, J. \VALTER SMITH.

